#include <stdio.h>

#define MAX_N 500
#define MIN_N 0
int main(int argc, char **argcv) {
	int sum = 0;
	for (int i=MIN_N; i<=MAX_N/2; i++){
		sum += 2 * i;
	}
	
	printf("\n\nThe sum is %d\n\n", sum);
}
